Rotary disk bit



Sept, 7 1926. 1,599,094 v. 'J. KUBIN ET AL ROTARY DISK BIT Filed July'7. 1925 IN V N TORS.

B fer/y Furrderar'k ATTORNEY.

I 1,599,094 I UNITED TATE-s, PATENT owner. I van 3. run! rmnaym x orromucn cann'oun EISSU/EU no'ranrnm arr,

umm me m 7, use. trial He. 42,012.

'lhis invention is a rotary drill' bit, par ticularly useful fordrillmgoil wells, and the eneral drill it with high cuttingefliciency.

object-thereof is to provide a cut'only the side of the bore, thusrelieving each cutting edge of undue work and increasing eflilciency ofthe cutters and the,b'it m nera 'A more rticular obj t is to provide aThe stem 1 is formed with the usual drill bit 0 the character statedwith three threaded pm 13 on the upper end or more cutters acedso asto-eflectively center the bit at a times;

A further object is drill bit with double-edge cutters, arra so that onewill cut the bottom and the other edge Other objects and advantages willappear hereinafter. a

The invention is illustrated in the annexed drawing in which,- Figure 1is a side elevation of our bit. Figure 2 is a bottom plan view thereof.

- Figure 3 is a cross section through one of the uttersand its journaland bearing, taken online33ofFigure1.

Corresp n Our bit compnses a forked arms .2, preferabl artsin all thefires. gp shmhapluralftof of said stem, and diskrutters 3 respectivelybetween the members 4.,a'nd it of said forked arms on bushings 6 whichare fitted on bolts 7 extending throutglh resyctrvely, e

heads Sofsaid bolts g t e side mom-- o'ther'gsi e'memltagl's 5 3?- .nutsscrew sea on e .of said bolts, whereby the pod between said memareslightly longer than said cutters 3 so that the'cuttc'rs y between thearm members Ind 6 while thebushingsareelamped peri herall grooved to'perip eral cutt ng The cutter arms 2 are apart so that the cutters 12of the well, will set at such angles to provide a rotaryv cut the sideof the well in its periphery and thereby forme reference charactersdesigthree in number witha it in the well. The

the bit that in.

for ing the box on the lower end of thz fii'fil *stemand couplingthe-bit to said stem,'and

the stem .1 is also provided with an axial bore 14 which communicateswith the bore of the drill stemfor feedi water to the cutters'3tofacilitate the g operation of the bit.

We claimj 1. A drill bit including a stem, a lurality of arms formed onthe lower en of said stem, disk cutters journaled in said arms, saidcutters each being annularl grooved at with a pair of spaced cuttingedges, said arms being set at angles to the axis of said stem so-thatone cutting edge of the cutters will cut the bottom of the well bore andthe other cutting edge will cut the side of the bore. more arms formedon the lower end of said stem and spaced equidistant apart,*three ormore disk cutters said arms, said cutters each being grooved at itsperipllligg pair of sp cutting said arms being set at angles to the axleof the stem so that one cuttmg edge of the cutters will cut the bottomand the other cutting edge will cut' the side of the-well bore. 1

3. A drill bit including a stem, a lurality of arms formed on the loweren of said stem, disk cutters journaled in said arms, said cutters eachbeing annularly ved at its peripherv and thereby forms with a air ofspaced-{citing edges, said arms bemg-set at an ice to c axis of saidstem so that one cutting edge of the cutters will cut and thereby formedthe bottom of the well bore and the other ranged in such manner as tocut scoreless In testimony whereof we oursignatures.

' VAN J. KUBIN. PERRY FUNDERBURK.

hereunto aflix

